[Bugs] [Bug 1401812] RFE: Make readdirp parallel in dht

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1401812



--- Comment #19 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: http://review.gluster.org/16042 committed in master by Raghavendra G
(rgowdapp at redhat.com) 
------
commit f60631904defdaec2f1bae84b3cfd6a3e083cf09
Author: Poornima G <pgurusid at redhat.com>
Date:   Tue Dec 6 16:31:51 2016 +0530

    readdir-ahead: Enhance EOD detection logic

    Issue:
    Currently end of directory is identified on obtaining a
    readdirp_cbk with op_ret = 0 (i.e. 0 entries fetched in
    readdirp). Thus an extra readdirp is required for every
    directory just to identify EOD. Consider a case of listing
    large number of small directories. The readdirp fops required
    are doubled in that case.

    Solution:
    On reaching the EOD, posix sets the op_errno to ENOENT,
    hence along with looking for 'op_ret == 0' we also
    look for 'operrno == ENOENT' ehile checking for EOD condition

    Change-Id: I7a5b52e7b98f5dc236c387635fcc651dac0171b3
    BUG: 1401812
    Signed-off-by: Poornima G <pgurusid at redhat.com>
    Reviewed-on: http://review.gluster.org/16042
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Raghavendra G <rgowdapp at redhat.com>

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